Improvement in rotary pumps



liminary description.

UNITED STATES PATENT OFFICE.

CHARLES I. DUPONT, JR, OF WILMINGTON, DELAWARE.

IMPROYEMENT IN ROTARY PUMPS.

Specification forming My invention consists of a simple and economical rotary pump, constructed in a manner too fully explained hereafter to need pre- In the accompanying drawing, Figure l is avertical section of my improved rotary pump; Fig. 2, a sectional plan on the line 1 2, Fig. 1; Fig. 3, a horizontal section of one of the sets of fixed vanes; and Fig. 4, avertical section of a modification.

The exterior facing of the pump consists, in the present instance, of two parts bolted together on the line 1 2, the portion of the easin g from a to b being cylindrical for the reception of the upper and lower sets B and B of stationary vanes, and the intermediate wheel D, which is secured to a shaft, E, passing through and turning in a projection, 01, of the casing, and driven by any prime mover. The upper series of vanes are inclined, as shown,- and are cast or otherwise secured to a plate, the whole being snugly fitted in and secured to the interior of the lower end of the upper portion of the casing A and from this plate extends a cone, G, the base of which covers the whole of the plate excepting the vanes. The apex of the cone terminates at a pipe, or, which forms a continuation of the casin g. The wheel D consists of a cylinder, 0, connected to a central hub secured to the shaft E, and its blades or vanes fare inclined, but in a direction the reverse of that of the upper and lower set of stationary vanes. The lower end of the shaft turns in the center of the plate to which the lower set of stationary vanes B are cast or secured, and from the under side of this plate extends a cone, H, the base of which covers all of the lower plate excepting the vanes, whichproject therefrom, these vanes being inclined in the same manner and direction as the upper set of vanes.

which has access to the lower The water,

portion A of the casing, is forced by the cone part of Letters Patent No. 130 113, dated August 6, 1872.

E into an annular volume, which, passing between the lower set of stationary vanes, is directed by the same into a course the most advantageous for the action of the vanes of the wheel, which revolves in the direction of the arrow. The wheel, while raising the water,

tends to impart to the same an objectionable whirling motion, which is counteracted by the upper set E of, stationary vanes, from which the water ascends in a comparatively direct course and in the form of an annular volume, owing to the presence of the cone G, until, after passing the apex of the said cone, the water becomes a solid stream in a pipe, as, communicatin g with the upperportion ofthe casin g.

The two cones Gr and-H perform important duties the lower cone that of directing the water in an annular volume of the desired dimensions to the lower set of stationary vanes, while the upper cone prevents the disturbance of a mass of water above the upper set of vanes and forms, with the casing, an annular channel for keeping the water within bounds, the said channel gradually vanishing into one of circular form.

In the modification of my invention, Fig. 4, the stationary vanes and those of the wheel D are curved as well as inclined in a manner which will be readily understood on reference to the drawing, without description.

I claim as my invention 1. A rotarypuinp, consisting of an outer casing, a wheel revolving within the casing, and cones G and H, arranged above and below the wheel, with their bases adjacent thereto, substantially as described.

2. The combination of the casingA A, con structed substantially as described, the wheel D, and stationary vanes B B, arranged above and below the wheel, and inclined in respect to the vanes of the latter, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES I. BUE'QNT, JR.

7, Witnesses:

DAVID FARRA,

-MARY M. FARRA. 

